Abstract: Among other things, techniques are described for predictive maintenance using vibration analysis of vane pumps. Sensor data is obtained and pre-processed the sensor data according to at least one feature extraction system. The features are extracted from the pre-processed sensor data and classified into at least one operating condition. A representation of the at least one operating condition is rendered at a device.

Abstract: In a circuit adapted to supply a voltage Vs an electronic device, such as a load or a light source said voltage Vs is led to a circuit (ACG) that is able to derive a voltage VACG from Vs where VACG?Vs. The circuit consist in a first embodiment of three serial coupled diodes (D1,D2,D3) and two capacitors (C1,C2), and where the capacitor (CI) is coupled in parallel with tow of the diodes (D1,D2) and the capacitor (C2) is coupled in parallel with the diodes (D2,D3). In this way an Asymmetric Current Generator (ACG) is provided, that from a normal periodic source voltage Vs can derive two voltages both of which are suitable for a rechargeable battery or a light source. In this way a cost effective voltage in which the voltage required for the electronic device is beneficial for recharging the battery or strengthen the light for a LED light source leading to save in current cost and a fast recharging of the rechargeable battery and gaining light from the light source.

Abstract: In a circtuit adapted to supply a voltage VS an electronic device, such as a load or a light source said voltage VS is led to a circuit (ACG) that is able to derive a voltage VACG from VS where VACG?VS. The circuit consist in a first embodiment of three serial coupled diodes (D1,D2,D3) and two capacitors (C1,C2), and where the capacitor (C1) is coupled in parallel with tow of the diodes (D1,D2) and the capacitor (C2) is coupled in parallel with the diodes (D2,D3). In this way an Asymmetric Current Generator (ACG) is provided, that from a normal periodic source voltage VS can derive two voltages both of which are suitable for a rechargeable battery or a light source. In this way a cost effective voltage in which the voltage required for the electronic device is beneficial for recharging the battery or strengthen the light for a LED light source leading to save in current cost and a fast recharging of the rechargeable battery and gaining light from the light source.